She is obviously a shopaholic and a spendthrift.
You, on the other hand, are a person seeking stability, and her actions will make you feel anxious.
I can only say that different concepts of money are fraught with risks.
Second, she lacks the ability to love. Love is first to give, not to receive. This is the essence of love.
Did she do anything for you? In a relationship, it would be nice to be more understanding and gentle.